Compliment

Today I got an unexpected compliment from somebody at work that is about to retire. She stopped by my desk and told me that she thought "I was one of the good ones", that she hopes I continue to move up in the company, and that if she still had her career ahead of her she would love to report to me. It was a nice thing for her to say. All I could say back was "Thanks, I will continue trying my best". Not very inspirational I guess, but what was I suppose to say? Certainly not something along the lines of "I know right? I am definitely the best".